Just keep practicing, and I recommend you get those trucks if you think they will help. As for the kickflips, you will get better at them, it's almost impossible to get worse. It's a good idea to try fakie flips while you're learning, they are actually easier. Nailing the footing problem is just looking at the board. You have to do each step one at a time. Look down when you're in the air, and when you see the grip tape again plant your feet back and you should nail it.
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